{"id":37796,"date":"2020-10-29T17:54:45","date_gmt":"2020-10-29T09:54:45","guid":{"rendered":"\/blog\/?p=37796"},"modified":"2020-10-30T09:39:24","modified_gmt":"2020-10-30T01:39:24","slug":"aht21-the-new-generation-of-industrial-grade-temperature-and-humidity-sensor","status":"publish","type":"post","link":"https:\/\/www.seeedstudio.com\/blog\/2020\/10\/29\/aht21-the-new-generation-of-industrial-grade-temperature-and-humidity-sensor\/","title":{"rendered":"AHT21: The New Generation of Industrial Grade Temperature And Humidity Sensor"},"content":{"rendered":"\n<p><a href=\"http:\/\/www.aosong.com\/products-99.html\">AHT21<\/a>, a new generation of temperature and humidity sensor produced by <strong><a href=\"http:\/\/www.aosong.com\/\">ASAIR, Aosong Electronics<\/a><\/strong>, is embedded in a dual-row flat leadless SMD package suitable for reflow soldering, with a bottom surface of 3x3mm and a height of 0.8mm. The sensor outputs a calibrated digital signal in a standard I\u00b2C format.<\/p>\n\n\n\n<p>The previous version of AHT20 Temperature and Humidity Sensor also provides Industrial Grade features of improved MEMS semiconductor capacitive humidity sensor and a standard on-chip temperature sensor. The output is the I2C protocol with the Grove interface.<\/p>\n\n\n\n<p>Temperature and humidity sensors are most common in various scenarios such as home appliances, medical care, industry, transportation, smart agriculture, smart farming, meteorology, infrastructure, smart homes, and smart properties. Let&#8217;s take a look at this new solution based on the AHT21 sensor and talk about its chip, specifications, and compatible application scenarios. <\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2020\/10\/image-44.png\" alt=\"\" class=\"wp-image-37797\" width=\"287\" height=\"218\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/10\/image-44.png 574w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/10\/image-44-300x228.png 300w\" sizes=\"(max-width: 287px) 100vw, 287px\" \/><figcaption>AHT21<\/figcaption><\/figure><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Features<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Fully calibrated<\/li><li>Digital output, I\u00b2C interface<\/li><li>Excellent long-term stability<\/li><li>SMD package is suitable for reflow soldering<\/li><li>Quick response and strong anti-interference ability<\/li><\/ul>\n\n\n\n<p>AHT21 is equipped with a newly designed ASIC dedicated chip, an improved semiconductor capacitive humidity sensor element, and a standard on-chip temperature sensor element. Its performance has been greatly improved or even exceeded the reliability level of the previous generation of sensors, such as AHT20 (<em><a href=\"https:\/\/www.seeedstudio.com\/blog\/2020\/03\/02\/introducing-aht20-i2c-temperature-and-humidity-sensor-industrial-grade\/\">Introducing AHT20 I2C Temperature and Humidity Sensor- Industrial Grade<\/a><\/em>). AHT21 temperature and humidity sensor is able to perform stably in extremely harsh environments more stable.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1030\" height=\"421\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2020\/10\/image-48-1030x421.png\" alt=\"\" class=\"wp-image-37801\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/10\/image-48-1030x421.png 1030w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/10\/image-48-300x123.png 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/10\/image-48-768x314.png 768w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/10\/image-48-1024x419.png 1024w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/10\/image-48.png 1184w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Specifications Comparision of AHT21 and AHT20<\/h2>\n\n\n\n<p>Compare with AHT20, AHT21 can detect a wider range of temperature from -40\u2103 to +120\u2103. AHT21 also has a smaller size, the height has been compressed to 0.8mm.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"\"><tbody><tr><td>Supply\n  voltage (DC)<\/td><td>2.0-5.5V<\/td><td>2.0 &#8211; 5.5V<\/td><\/tr><tr><td><strong>Measuring range (temperature)<\/strong><\/td><td><strong>-40~+120\u2103<\/strong><\/td><td><strong>-40 ~ + 85 \u2103<\/strong><\/td><\/tr><tr><td>Measuring range\n  (humidity)&nbsp;<\/td><td>&nbsp;0~100%RH<\/td><td>\n  \n  0 ~ 100% RH<\/td><\/tr><tr><td>Humidity accuracy<\/td><td>\u00b12%RH(25\u2103)<\/td><td>\u00b1 2 % RH ( 25 \u2103 )<\/td><\/tr><tr><td>Temperature accuracy<\/td><td>\u00b10.3\u2103<\/td><td>\u00b1 0.3 \u2103<\/td><\/tr><tr><td>Resolution temperature<\/td><td>&nbsp;0.01\u2103<\/td><td>0.01\u2103<\/td><\/tr><tr><td>Resolution humidity<\/td><td>0.024%RH<\/td><td>0.024%RH<\/td><\/tr><tr><td>Output signal<\/td><td>I\u00b2C<\/td><td>I\u00b2C<\/td><\/tr><tr><td><strong>Size<\/strong><\/td><td><strong>Bottom surface of 3x3mm and a height of 0.8mm<\/strong><\/td><td><strong>Bottom surface of 3 x 3 mm and a height of 1.0 mm<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Compatible application scenarios<\/h2>\n\n\n\n<p>AHT21 is recommended to be applied in:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>HVAC<\/li><li>Dehumidifier testing, and inspection equipment<\/li><li>Consumer products that need to detect temperature and humidity,<\/li><li>Automobiles<\/li><li>Automatic control<\/li><li>Data loggers<\/li><li>Weather stations<\/li><li>Home appliances<\/li><li>Humidity adjustment<\/li><li>Medical and other related temperature and humidity detection and control.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Previous Version: AHT20 <\/h2>\n\n\n\n<p><a href=\"https:\/\/www.seeedstudio.com\/Grove-AHT20-I2C-Industrial-grade-temperature-and-humidity-sensor-p-4497.html\"><strong>Grove \u2013 AHT20 I2C Industrial Grade Temperature and Humidity Sensor<\/strong><\/a><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2020\/10\/image-45-1030x1008.png\" alt=\"\" class=\"wp-image-37798\" width=\"258\" height=\"252\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/10\/image-45-1030x1008.png 1030w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/10\/image-45-300x294.png 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/10\/image-45-768x752.png 768w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/10\/image-45-1024x1002.png 1024w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/10\/image-45.png 1038w\" sizes=\"(max-width: 258px) 100vw, 258px\" \/><\/figure><\/div>\n\n\n\n<p>Grove AHT20 Temperature and Humidity sensor is based on AHT20, a new generation of temperature and humidity sensor embedded with a dual-row flat and no-lead SMD package, suitable for the reflow soldering. AHT20 is equipped with a newly designed ASIC chip: an improved MEMS semiconductor capacitive humidity sensor, and a standard on-chip temperature sensor. The output is the I2C protocol with the Grove interface. <\/p>\n\n\n\n<p>You can also check the blog<em> <a href=\"https:\/\/www.seeedstudio.com\/blog\/2020\/03\/02\/introducing-aht20-i2c-temperature-and-humidity-sensor-industrial-grade\/\">Introducing AHT20 I2C Temperature and Humidity Sensor- Industrial Grade <\/a><\/em>for more details and we introduced how fast Seeed can realize from idea to the final product. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"888\" height=\"354\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2020\/10\/image-46.png\" alt=\"\" class=\"wp-image-37799\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/10\/image-46.png 888w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/10\/image-46-300x120.png 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/10\/image-46-768x306.png 768w\" sizes=\"(max-width: 888px) 100vw, 888px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"\"><tbody><tr><td>Price<\/td><td>$4.90<\/td><\/tr><tr><td>Temperature Range<\/td><td>-40 \u2013 85\u2103<\/td><\/tr><tr><td>Humidity Range<\/td><td>\u00b1 2% RH (25 \u2103)<\/td><\/tr><tr><td>Temperature accuracy<\/td><td>\u00b1 0.3 \u2103<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"899\" height=\"1030\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2020\/10\/image-47-899x1030.png\" alt=\"\" class=\"wp-image-37800\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/10\/image-47-899x1030.png 899w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/10\/image-47-262x300.png 262w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/10\/image-47-768x880.png 768w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/10\/image-47-1024x1173.png 1024w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/10\/image-47.png 1138w\" sizes=\"(max-width: 899px) 100vw, 899px\" \/><\/figure>\n\n\n\n<p>Based on the temperature and humidity sensor AHT21 chip, <a href=\"http:\/\/www.aosong.com\/\">Aosong Electronics<\/a> also launched a series of temperature and humidity sensor module sensors-AHT21B, AM2301B, AM2311B, and other products. This series of sensors all offer stable performance, high accuracy, fast response speed, strong anti-interference ability, etc. <\/p>\n\n\n\n<p>Based on the AM2301B temperature and humidity sensor: users can also customize products according to actual application scenarios and cost considerations by selecting chips, PCB boards, shells, protective covers, wires, etc.<\/p>\n\n\n\n<p>To learn about more temperature sensor, we have introduced the following sensors in the blog&nbsp;<em><a href=\"https:\/\/www.seeedstudio.com\/blog\/2019\/08\/22\/8-types-of-temperature-sensors-you-should-know\/\">9 Types of Temperature Sensors You Should Know<\/a><\/em>:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>DHT11<\/li><li>DHT22\/am2302<\/li><li>BMP280<\/li><li>BME280<\/li><li>DS18B20<\/li><li>AF5485<\/li><li>AM2311A<\/li><li>AHT20 <\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><a href=\"https:\/\/www.seeedstudio.com\/fusion_pcb.html\">Seeed Fusion Service <\/a>delivers the customized solution <\/h2>\n\n\n\n<p>If you need the customized solution based on AHT21 temperature and humidity sensor chip, the Seeed Fusion turnkey PCB Assembly service has you covered:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>One-stop assembly service: PCB Fabrication, components procurement, and assembly. <\/li><li>Over 150,000 components in the Seeed OPL, shorten the production time to just 7 working days.<\/li><li> FREE express shipping worldwide.<\/li><li>Free DFA (Design for Assembly) Review for all PCBA orders.<\/li><li>$0 operation fees for orders over 100 pieces.<\/li><li> Get a smart online quote from Seeed Fusion Now! <a href=\"https:\/\/www.seeedstudio.com\/fusion_pcb.html\">www.seeedstudio.com\/fusion_pcb.html<\/a><\/li><\/ul>\n\n\n\n<p> <\/p>\n","protected":false},"excerpt":{"rendered":"<p>AHT21, a new generation of temperature and humidity sensor produced by ASAIR, Aosong Electronics, is<\/p>\n","protected":false},"author":200,"featured_media":37797,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"iawp_total_views":0,"footnotes":""},"categories":[1],"tags":[2978,142,128],"class_list":["post-37796","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-aht20","tag-open-hardware","tag-temperaturehumidity-sensor"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>AHT21: The New Generation of Industrial Grade Temperature And Humidity Sensor - Latest News from Seeed Studio<\/title>\n<meta name=\"description\" content=\"AHT21, a new generation of temperature and humidity sensor, is embedded in a dual-row flat leadless SMD package suitable for reflow soldering, with a bottom surface of 3x3mm and a height of 0.8mm. 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